blob: 1d83152c761bcb1f74929006fbe52d450d68b81c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/types.h>
#include <linux/tick.h>
#include <linux/percpu-defs.h>
#include <xen/xen.h>
#include <xen/interface/xen.h>
#include <xen/grant_table.h>
#include <xen/events.h>
#include <asm/cpufeatures.h>
#include <asm/msr-index.h>
#include <asm/xen/hypercall.h>
#include <asm/xen/page.h>
#include <asm/fixmap.h>
#include "xen-ops.h"
#include "mmu.h"
#include "pmu.h"
static DEFINE_PER_CPU(u64, spec_ctrl);
void xen_arch_pre_suspend(void)
{
xen_save_time_memory_area();
if (xen_pv_domain())
xen_pv_pre_suspend();
}
void xen_arch_post_suspend(int cancelled)
{
if (xen_pv_domain())
xen_pv_post_suspend(cancelled);
else
xen_hvm_post_suspend(cancelled);
xen_restore_time_memory_area();
}
static void xen_vcpu_notify_restore(void *data)
{
if (xen_pv_domain() && boot_cpu_has(X86_FEATURE_SPEC_CTRL))
wrmsrl(MSR_IA32_SPEC_CTRL, this_cpu_read(spec_ctrl));
/* Boot processor notified via generic timekeeping_resume() */
if (smp_processor_id() == 0)
return;
tick_resume_local();
}
static void xen_vcpu_notify_suspend(void *data)
{
u64 tmp;
tick_suspend_local();
if (xen_pv_domain() && boot_cpu_has(X86_FEATURE_SPEC_CTRL)) {
rdmsrl(MSR_IA32_SPEC_CTRL, tmp);
this_cpu_write(spec_ctrl, tmp);
wrmsrl(MSR_IA32_SPEC_CTRL, 0);
}
}
void xen_arch_resume(void)
{
int cpu;
on_each_cpu(xen_vcpu_notify_restore, NULL, 1);
for_each_online_cpu(cpu)
xen_pmu_init(cpu);
}
void xen_arch_suspend(void)
{
int cpu;
for_each_online_cpu(cpu)
xen_pmu_finish(cpu);
on_each_cpu(xen_vcpu_notify_suspend, NULL, 1);
}
|
